Aluminum rectifier



Aug. 17 19261 Z. TAKAHASHI ALUMINUM RECTIFIER .E'iled Sept. 7 1922 Patented Aug. 17, 1926.

PATENT OFFICE.

ZINBU'KE TAKAHASEI, OI ASHIIAGA, JAPAN.

ALUMINUM um Application filed September 7, 1922, Serial 1T0. 586,582, and in Japan December 22, 1921.

The present invention relates to improvements in the aluminum rectifier used for converting the alternating current into the direct current and has for its object to obtain the exact, lon and eflicient rectifying action compared with the known aluminum rectifier.

The aluminum rectifier according to this invention is so characterized that a lead tank is formed moderately flat to serve as one electrode as well as an electrolyte container, and an aluminum rod, which is vertically supported and serves as the other electrode, is arran to always prws the bottom of the lead t under the weight of the rod itself and the action of springs through a thin plate of insulatin material which can coniluct electricity w en wet with the electroyte.

In the accompanying drawingv given by waiy of example:

igure 1 shows an elevational view partly in section of an aluminum rectifier according to the invention, and

Figure 2 shows a plan view of the said aluminum rectifier in the electric circuit.

In the drawing, a lead tank 1 is formed. moderately flat to serve as one electrode as well as an electrolyte container, and an aluminum rod 2 is verticall supported by a wooden bar 3, which bri ges over the lead tank, and serves as the other electrode. The lowest end of the rod 2 presses the bottom of the tank 1 through a thin plate4 of insulating material, such as thick paper, fibre tissue, etc, which can conduct e tricit when it gets wet with the electrolyte. On t e upper art of the said rod is so ara me sleeve 5 as the rod alwa s contacts with the plate 4 under the weig t of the rod itself and the action of springs 6 attached to the sleeve. One of the springs 6 is secured to one terminal 7 while the other is secured. to the wooden support 3 as shown in the drawing. The other terminal 8 is in the electrical connection with the lead tank 1:. The whole members are put in a wooden case not shown in the drawing) so as to be porta le.

The working of the present aluminum rec- The terminals 7 and 8 are connected with the alternating current supply source 9 through a lamp resistance 10, for example, and a battery 11, respectively, the terminal 8 in the electrical connection with the lead tank 1 being connected with the negative electrode of the said battery, as shown in Figure 2. Then the current exactly passes on y lyte from the lead tank to the aluminum rod, and charges the battery. If the aluminum electrode were dissipated at the low est end, it would be forced to come down and touch the thin plate by means of the weight of the rod itself and the action of the springs, thus the distance between the electrodes remainin the same. Moreover the area of the lea electrode contact with the electrolyte being comparatively lag, the rectifying action takes lace more e ciently and continues relatively long notwithstandin that the quantity of the electrolyte gra ually decreases owing to the evaporatlon.

It is of course to be understood that the aluminum rectifier described above may be used for various purposes-besides the batgo charging, and also that it may be modifrom the scope of this invention.

I claim An aluminum rectifier comprising a lead tanlc adapted to serve as one electrode as well as an electrolyte container, an aluminum rod adapted to serve as the other electrode, a thin late of insulating material on the bottom of said tank interposed between the end of said rod and the bottom of said tank, and sprin interposed between the tank, andsaid adapted to act as electric conductors and to press'said rod a ainst said plate, means bridged over "the tan for supporting said rod and springs and insulating the same from the tank, said thin plate adapted to conduct electricity when wet with the electrolyte.

In testimon whereof I aflix my signature.

ENSUKE TAKAHASHI.

in one direction through the electro in various manners without departing 

